My dad hates the guts out of Windows 7 and will only like it if it's XP or lower.
He thinks anything older is better, no matter what it is.
nfact, I had my computer set to the classic theme and my dad thought it was some special version of XP or 2000 or something and he's like "Oh this is amazing" and when the theme gets set back he's all hating it now realizing it's a newer OS, all of a sudden he thinks it was hard to use and stuff, when before he thought it was really nice and cool.